So far you can walk around tristram, and the first few levels of random dungeon.http://freeablo.org/ is the (very basic) website I have for now, and the repo is at http://github.com/wheybags/freeablo.
I know there are a lot of talented developers here, so I am here to scrounge for contributors :3

You know what I think you should add, is multiplayer. That'd be a really great feature.

Jokes aside, I'm really excited for this! What are you plans regarding moddability? I remember D1 only had one armor set that actually showed on your character, do you think more complex art support will be possible with mods of your engine?

EDIT: I readed your paper, which claims: "It will use the original data files, so as to avoid issues with copyright, but will also support modern file formats, and be a generic engine for games of that style." Very cool.